The relationship between the Straw Hats has always been one of the most important aspects of One Piece. Being a sort of found family for each other, each duo on the crew offers a unique dynamic to explore throughout the series. Between Sanji’s and Zoro’s rivalry, or Luffy and Usopp’s goofy friendship, more often than not, the Straw Hat Crew in One Piece feels like a big happy family.